A racecar goes around a 200 m radius curve at a constant speed of 40 m/s.Its acceleration is 8 m/s2.
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Q44: A racecar driver steps on the gas,changing
Q45: Two microcuries is
A)200,000 Ci.
B)0.0002 Ci.
C)0.00002 Ci.
D)0.000002 Ci.
E)0.00000002
Q46: When a body moves in circular motion
Q47: Twenty milliseconds is
A)0.00002 s.
B)0.0002 s.
C)0.002 s.
D)0.02 s.
E)20000
Q48: Twenty kilometers is
A)200,000 m.
B)20,000 m.
C)2,000 m.
D)200 m.
E)0.02
Q50: In expressions like Δv and Δt,Δ stands
Q51: The acceleration after starting from rest is
Q52: Which metric prefix means one thousand?
A)milli-
B)centi-
C)one-
D)kilo-
E)mega-
Q53: A racecar driver steps on the gas,and
Q54: The distance from the starting point is
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